MooreHawke, a division of Moore Industries, has released TRUNKSAFE brochure, which contains technical details on the world’s redundant fieldbus system.
Previously, to obtain a fault-tolerant, redundant FOUNDATION fieldbus system, users had to duplicate everything in the segment, including H1 cards, power supplies, device couplers and all the field devices, such as transmitters and valves.
Achieving redundancy was expensive and relied on special software (1oo2, 2oo3 voting schemes) within the DCS.
If a critical process unit goes down because of a failed fieldbus segment, the cost can be enormous: some estimates say $500,000 per hour when a refinery is down.
The fieldbus world has needed a fault-tolerant system for years, but few redundant systems have ever been installed in the process control industry because of high costs and systems configuration headaches.
The TRUNKSAFE brochure explains how, with TRUNKSAFE, it is not necessary to duplicate the entire segment to achieve redundancy.
Important, it is not necessary to duplicate the field instruments or to have any special software at the DCS, which can save users tens of thousands of dollars per fieldbus segment.